ancestress - a woman ancestor

forbear, forebear - a person from whom you are descended

forefather, sire, father - the founder of a family; "keep the faith of our forefathers"

foremother - a woman ancestor

primogenitor, progenitor - an ancestor in the direct line

relative, relation - a person related by blood or marriage; "police are searching for relatives of the deceased"; "he has distant relations back in New Jersey"